Any suggestions ?

[Fluffy101]

Twice in the last week I have suddenly gone very faint, feels like low blood sugar, my ears started hurting and I feel dizzy. I have not changed the amount I have eaten recently .
I do have slight sinus issues and not sure wether they could cause these random symptoms?

Blood pressure?

Sinus issues can affect your ears, which would screw up your balance and cause similar symptoms. Try taking some otc sudafed (you have to actually ask for it at a pharmacy counter) and see if that fixes it.